25.4 mm Gears | McMaster-Carr

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	Number of Teeth Number of Teeth

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	Roller Chain Trade Size Roller Chain Trade Size

16B

16B-2

	System of Measurement System of Measurement

Metric

	For Shaft Diameter For Shaft Diameter

	Pitch Pitch	Show

25.4 mm

	Pitch Pitch	Hide

	For Roller Chain Strand Type For Roller Chain Strand Type


Single	Double

	Bore Type Bore Type

Machinable

Finished

Bushing

	OD OD

	Material Material

Steel

	Roller Chain Standard Roller Chain Standard

ISO

DIN

	Sprocket Type Sprocket Type

Standard

Idler

	Overall Width Overall Width

	Specifications Met Specifications Met

ISO

DIN

	For Shaft Type For Shaft Type

	Round

	For Maximum Shaft Diameter For Maximum Shaft Diameter

	ID ID

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Hub Diameter Hub Diameter

	For Bushing Type For Bushing Type

Taper Lock

	Teeth Heat Treatment Teeth Heat Treatment

Hardened

	Bearing Material Bearing Material

Steel

	Bearing Type Bearing Type

	Ball

	Shaft Mount Type Shaft Mount Type

Press Fit

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172 Products

About Roller Chain and Sprockets

With metric teeth and slim profile, these sprockets allow your ISO roller chain to reach narrow spaces. They're commonly referred to as A-plate sprockets. Machine the unfinished bore to fit your shaft—sprockets come machined to the shaft diameter listed and are machinable up to the maximum shaft diameter size. Sprockets meet DIN 8187 and ISO 606, international standards for sprockets and roller chains.

For technical drawings and 3-D models, click on a part number.

For ISO 16B Roller Chain (25.4 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Material	Specifications Met		Each
11	14	64	101.85	17	Steel	DIN 8187, ISO 606	00000000	000000
12	14	72	109.98	17	Steel	DIN 8187, ISO 606	00000000	00000
13	14	80	118.36	17	Steel	DIN 8187, ISO 606	00000000	00000
14	14	89	126.49	17	Steel	DIN 8187, ISO 606	00000000	00000
15	14	97	134.62	17	Steel	DIN 8187, ISO 606	00000000	00000
16	14	105	143	17	Steel	DIN 8187, ISO 606	00000000	00000
17	14	113	151.13	17	Steel	DIN 8187, ISO 606	00000000	00000
18	24	121	159.26	17	Steel	DIN 8187, ISO 606	00000000	00000
19	24	130	167.39	17	Steel	DIN 8187, ISO 606	00000000	00000
20	24	138	175.51	17	Steel	DIN 8187, ISO 606	00000000	00000
21	24	146	183.64	17	Steel	DIN 8187, ISO 606	00000000	00000
22	24	154	192.02	17	Steel	DIN 8187, ISO 606	00000000	00000
23	24	162	200.15	17	Steel	DIN 8187, ISO 606	00000000	00000
24	24	170	208.28	17	Steel	DIN 8187, ISO 606	00000000	00000
25	24	178	216.41	17	Steel	DIN 8187, ISO 606	00000000	00000
26	30	187	224.54	17	Steel	DIN 8187, ISO 606	00000000	00000
27	30	195	232.66	17	Steel	DIN 8187, ISO 606	00000000	000000
28	30	203	240.79	17	Steel	DIN 8187, ISO 606	00000000	000000
29	30	211	248.67	17	Steel	DIN 8187, ISO 606	00000000	000000
30	32	219	256.79	17	Steel	DIN 8187, ISO 606	00000000	000000
31	32	227	264.92	17	Steel	DIN 8187, ISO 606	00000000	000000
32	32	235	273.05	17	Steel	DIN 8187, ISO 606	00000000	000000
33	32	243	281.18	17	Steel	DIN 8187, ISO 606	00000000	000000
34	32	251	289.31	17	Steel	DIN 8187, ISO 606	00000000	000000
35	32	260	297.43	17	Steel	DIN 8187, ISO 606	00000000	000000
36	32	268	305.56	17	Steel	DIN 8187, ISO 606	00000000	000000
37	32	276	313.69	17	Steel	DIN 8187, ISO 606	00000000	000000
38	32	284	321.82	17	Steel	DIN 8187, ISO 606	00000000	000000
39	32	292	329.95	17	Steel	DIN 8187, ISO 606	00000000	000000
40	32	300	338.07	17	Steel	DIN 8187, ISO 606	00000000	000000
41	32	308	346.2	17	Steel	DIN 8187, ISO 606	00000000	000000
42	32	316	354.08	17	Steel	DIN 8187, ISO 606	00000000	000000
43	32	324	362.2	17	Steel	DIN 8187, ISO 606	00000000	000000
44	32	332	370.33	17	Steel	DIN 8187, ISO 606	00000000	000000
45	32	341	378.46	17	Steel	DIN 8187, ISO 606	00000000	000000
46	32	349	386.59	17	Steel	DIN 8187, ISO 606	00000000	000000
47	32	357	394.72	17	Steel	DIN 8187, ISO 606	00000000	000000
48	32	365	402.84	17	Steel	DIN 8187, ISO 606	00000000	000000
49	32	373	410.97	17	Steel	DIN 8187, ISO 606	00000000	000000
50	32	381	418.85	17	Steel	DIN 8187, ISO 606	00000000	000000
54	32	413	451.36	17	Steel	DIN 8187, ISO 606	00000000	000000
57	32	438	475.74	17	Steel	DIN 8187, ISO 606	00000000	000000
65	32	502	540.26	17	Steel	DIN 8187, ISO 606	00000000	000000
70	40	543	580.9	17	Steel	DIN 8187, ISO 606	00000000	000000
72	40	559	596.9	17	Steel	DIN 8187, ISO 606	00000000	000000
76	40	591	629.41	17	Steel	DIN 8187, ISO 606	00000000	000000
80	40	624	661.67	17	Steel	DIN 8187, ISO 606	00000000	000000
84	40	656	694.18	17	Steel	DIN 8187, ISO 606	00000000	000000
90	40	705	742.7	17	Steel	DIN 8187, ISO 606	00000000	000000
95	40	745	783.08	17	Steel	DIN 8187, ISO 606	00000000	000000
96	40	753	791.21	17	Steel	DIN 8187, ISO 606	00000000	000000
114	40	899	936.75	17	Steel	DIN 8187, ISO 606	00000000	000000

Sprockets for Metric Roller Chain

Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain. They come machined to the shaft diameter size listed and are machinable up to the maximum shaft diameter size.

For technical drawings and 3-D models, click on a part number.

For DIN, ISO 16B Roller Chain (25.4 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
11	16	41	106.03	40	63	Steel	DIN 8187, ISO 606	00000000	000000
12	16	47	114.01	40	72	Steel	DIN 8187, ISO 606	00000000	00000
13	16	52	122.01	40	79	Steel	DIN 8187, ISO 606	00000000	00000
14	16	60	130.02	40	88	Steel	DIN 8187, ISO 606	00000000	00000
15	16	62	138.04	40	96	Steel	DIN 8187, ISO 606	00000000	00000
16	20	67	146.07	45	100	Steel	DIN 8187, ISO 606	00000000	000000
17	25	67	154.11	45	102	Steel	DIN 8187, ISO 606	00000000	000000
18	25	70	162.15	45	108	Steel	DIN 8187, ISO 606	00000000	000000
19	25	70	170.19	45	108	Steel	DIN 8187, ISO 606	00000000	000000
20	25	70	178.24	45	108	Steel	DIN 8187, ISO 606	00000000	000000
21	25	70	186.3	50	108	Steel	DIN 8187, ISO 606	00000000	000000
22	25	70	194.35	50	108	Steel	DIN 8187, ISO 606	00000000	000000
23	25	70	202.41	50	108	Steel	DIN 8187, ISO 606	00000000	000000
24	25	70	210.47	50	108	Steel	DIN 8187, ISO 606	00000000	000000
25	25	70	218.53	50	108	Steel	DIN 8187, ISO 606	00000000	000000
26	32	80	226.6	50	120	Steel	DIN 8187, ISO 606	00000000	000000
27	32	80	234.67	50	120	Steel	DIN 8187, ISO 606	00000000	000000
28	32	80	242.73	50	120	Steel	DIN 8187, ISO 606	00000000	000000
29	32	80	250.8	50	120	Steel	DIN 8187, ISO 606	00000000	000000
30	32	80	258.87	50	120	Steel	DIN 8187, ISO 606	00000000	000000
31	32	80	266.94	50	120	Steel	DIN 8187, ISO 606	00000000	000000
32	32	80	275.01	50	120	Steel	DIN 8187, ISO 606	00000000	000000
33	32	80	283.09	50	120	Steel	DIN 8187, ISO 606	00000000	000000
34	32	80	291.16	50	120	Steel	DIN 8187, ISO 606	00000000	000000
35	32	80	299.23	50	120	Steel	DIN 8187, ISO 606	00000000	000000
36	32	80	307.31	50	120	Steel	DIN 8187, ISO 606	00000000	000000
37	32	80	315.38	50	120	Steel	DIN 8187, ISO 606	00000000	000000
38	32	80	323.46	50	120	Steel	DIN 8187, ISO 606	00000000	000000
39	32	80	331.53	50	120	Steel	DIN 8187, ISO 606	00000000	000000
40	32	80	339.61	50	120	Steel	DIN 8187, ISO 606	00000000	000000
41	32	80	347.69	50	120	Steel	DIN 8187, ISO 606	00000000	000000
42	32	80	355.76	50	120	Steel	DIN 8187, ISO 606	00000000	000000
43	32	80	363.84	50	120	Steel	DIN 8187, ISO 606	00000000	000000
44	32	80	371.92	50	120	Steel	DIN 8187, ISO 606	00000000	000000
45	32	80	380	50	120	Steel	DIN 8187, ISO 606	00000000	000000
46	32	80	388.08	50	120	Steel	DIN 8187, ISO 606	00000000	000000
47	32	80	396.16	50	120	Steel	DIN 8187, ISO 606	00000000	000000
48	32	80	404.24	50	120	Steel	DIN 8187, ISO 606	00000000	000000
49	32	80	412.32	50	120	Steel	DIN 8187, ISO 606	00000000	000000
50	32	80	420.39	50	120	Steel	DIN 8187, ISO 606	00000000	000000
54	32	85	452.72	50	130	Steel	DIN 8187, ISO 606	00000000	000000
57	32	85	476.96	50	130	Steel	DIN 8187, ISO 606	00000000	000000
65	32	85	541.61	50	130	Steel	DIN 8187, ISO 606	00000000	000000

Sprockets for Double-Strand Metric Roller Chain

The double row of teeth on these sprockets are designed to fit into metric ISO double-strand roller chain. They have an unfinished bore that’s machined to the shaft diameter size listed. Machine them to fit any shaft up to the maximum shaft diameter size. The extended hub makes these sprockets more stable and more durable than flat sprockets. They meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

For technical drawings and 3-D models, click on a part number.

For ISO 16B Roller Chain (25.4 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
11	20	42	106.03	70	63	Steel	DIN 8187, ISO 606	00000000	0000000
12	20	45	114.01	70	72	Steel	DIN 8187, ISO 606	00000000	000000
13	20	52	122.01	70	80	Steel	DIN 8187, ISO 606	00000000	000000
14	20	53	130.02	70	88	Steel	DIN 8187, ISO 606	00000000	000000
15	20	62	138.04	70	96	Steel	DIN 8187, ISO 606	00000000	000000
16	20	66	146.07	70	104	Steel	DIN 8187, ISO 606	00000000	000000
17	20	74	154.11	70	112	Steel	DIN 8187, ISO 606	00000000	000000
18	20	80	162.15	70	120	Steel	DIN 8187, ISO 606	0000000	000000
19	20	84	170.19	70	128	Steel	DIN 8187, ISO 606	00000000	000000
20	20	85	178.24	70	130	Steel	DIN 8187, ISO 606	00000000	000000
21	25	85	186.3	70	130	Steel	DIN 8187, ISO 606	00000000	000000
22	25	85	194.35	70	130	Steel	DIN 8187, ISO 606	00000000	000000
23	25	85	202.41	70	130	Steel	DIN 8187, ISO 606	00000000	000000
24	25	85	210.47	70	130	Steel	DIN 8187, ISO 606	00000000	000000
25	25	85	218.54	70	130	Steel	DIN 8187, ISO 606	00000000	000000
26	25	85	226.6	70	130	Steel	DIN 8187, ISO 606	00000000	000000
27	25	85	234.67	70	130	Steel	DIN 8187, ISO 606	00000000	000000
28	25	85	242.73	70	130	Steel	DIN 8187, ISO 606	0000000	000000
29	25	85	250.8	70	130	Steel	DIN 8187, ISO 606	00000000	000000
30	25	95	258.87	75	145	Steel	DIN 8187, ISO 606	00000000	000000
32	32	95	275.01	75	145	Steel	DIN 8187, ISO 606	00000000	000000
35	32	95	299.23	75	145	Steel	DIN 8187, ISO 606	00000000	000000
36	32	95	307.31	80	145	Steel	DIN 8187, ISO 606	00000000	000000
38	32	95	323.46	80	145	Steel	DIN 8187, ISO 606	00000000	000000
42	40	95	355.77	80	145	Steel	DIN 8187, ISO 606	00000000	000000

Idler Sprockets for Metric Roller Chain

Keep constant tension on your drive with these sprockets that press against your metric ISO roller chain to take up slack and reduce wear and vibration. They rotate freely on built-in ball bearings, which are double sealed to keep dirt out, and are for use with roller chain tensioners. All come with a finished bore that fits directly onto your shaft—no need for machining. These sprockets meet ISO 606, which is an international standard for dimensions and materials.

For technical drawings and 3-D models, click on a part number.

						Bearing
Number of Teeth	For Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Type	Material	Specifications Met		Each
For ISO 16B Roller Chain (25.4 mm Pitch)
12	20	109	18	47	Steel	Ball	Steel	ISO 606	000000	000000

Taper-Lock Bushing-Bore Sprockets for Metric Roller Chain

While their teeth fit into metric ISO roller chain, these sprockets use taper-lock bushings to grip shafts. That means you can switch to a different diameter shaft by changing the bushing instead of machining the sprocket. Bushings mount flush inside these sprockets; secure them in place by tightening the set screws included with the bushings. These sprockets have an extended hub that makes them more stable and durable than flat sprockets. All meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

For technical drawings and 3-D models, click on a part number.

For Single-Strand Roller Chain

For ISO 16B Roller Chain (25.4 mm Pitch)
Number of Teeth	For Bushing Style	OD, mm	Overall Wd., mm	Hub Dia., mm	Teeth Heat Treatment	Material	Specifications Met		Each
10	1215	93.47	38	62.69	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
11	1215	101.85	38	62.69	Hardened	Steel	DIN 8187, ISO 606	00000000	00000
12	1615	109.98	38	76.2	Hardened	Steel	DIN 8187, ISO 606	00000000	00000
13	1615	118.36	38	76.2	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
14	1615	126.49	38	82.55	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
15	1615	134.62	38	82.55	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
16	2012	143	32	90.47	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
17	2012	151.13	32	90.47	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
18	2012	159.26	32	90.47	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
19	2012	167.39	32	90.47	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
20	2517	175.51	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
21	2517	183.64	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
22	2517	192.02	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
23	2517	200.15	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
24	2517	208.28	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
25	2517	216.41	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
26	2517	224.54	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
27	2517	232.66	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
28	2517	240.79	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
30	2517	256.79	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
32	2517	273.05	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
35	2517	297.43	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
36	2517	305.56	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
38	2517	321.82	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
40	2517	338.07	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
45	2517	378.46	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
48	2517	402.84	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
54	2517	451.36	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
57	2517	475.74	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
60	2517	499.87	44	107.95	__	Steel	DIN 8187, ISO 606	00000000	000000
64	3020	532.38	51	133.35	__	Steel	DIN 8187, ISO 606	00000000	000000
70	3020	580.9	51	133.35	__	Steel	DIN 8187, ISO 606	00000000	000000
76	3020	629.41	51	133.35	__	Steel	DIN 8187, ISO 606	00000000	000000
84	3020	694.18	51	133.35	__	Steel	DIN 8187, ISO 606	00000000	000000
95	3020	783.08	51	133.35	__	Steel	DIN 8187, ISO 606	00000000	000000

For Double-Strand Roller Chain

For ISO 16B-2 Roller Chain (25.4 mm Pitch)
Number of Teeth	For Bushing Style	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
19	3020	167.39	51	127	Steel	DIN 8187, ISO 606	00000000	0000000
20	3020	175.51	51	133.35	Steel	DIN 8187, ISO 606	00000000	000000
21	3020	183.64	51	141.28	Steel	DIN 8187, ISO 606	00000000	000000
22	3020	192.02	51	149.23	Steel	DIN 8187, ISO 606	00000000	000000
23	3020	200.15	51	158.34	Steel	DIN 8187, ISO 606	00000000	000000
24	3020	208.28	51	166.68	Steel	DIN 8187, ISO 606	00000000	000000
25	3020	216.41	51	174.63	Steel	DIN 8187, ISO 606	00000000	000000
26	3020	224.54	51	182.56	Steel	DIN 8187, ISO 606	00000000	000000
27	3020	232.66	51	133.35	Steel	DIN 8187, ISO 606	00000000	000000
28	3020	240.79	51	133.35	Steel	DIN 8187, ISO 606	00000000	000000

Flat Taper-Lock Bushing-Bore Sprockets for Double-Strand Metric Roller Chain

With a slim profile and a double row of teeth, these sprockets allow your metric ISO double-strand roller chain to fit into tight spaces. They’re often called A-plate sprockets. To grip shafts, they use taper-lock bushings, so you can switch to a different diameter shaft by changing the bushing instead of machining the sprocket. Bushings mount flush inside these sprockets; secure them in place by tightening the set screws included with the bushings. All of these sprockets meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

For technical drawings and 3-D models, click on a part number.

For ISO 16B-2 Roller Chain (25.4 mm Pitch)
Number of Teeth	For Bushing Style	OD, mm	Overall Wd., mm	Material	Specifications Met		Each
13	1615	118.36	38	Steel	DIN 8187, ISO 606	00000000	0000000
14	2012	126.49	32	Steel	DIN 8187, ISO 606	00000000	000000
15	2012	134.62	32	Steel	DIN 8187, ISO 606	00000000	000000
16	2012	143	32	Steel	DIN 8187, ISO 606	00000000	000000
17	2517	151.13	44	Steel	DIN 8187, ISO 606	00000000	000000
18	2517	159.26	44	Steel	DIN 8187, ISO 606	00000000	000000

About Roller Chain and Sprockets

Flat Sprockets for Metric Roller Chain

Sprockets for Metric Roller Chain

Sprockets for Double-Strand Metric Roller Chain

Idler Sprockets for Metric Roller Chain

Taper-Lock Bushing-Bore Sprockets for Metric Roller Chain

Flat Taper-Lock Bushing-Bore Sprockets for Double-Strand Metric Roller Chain

Flat Sprockets for Metric Roller Chain

Sprockets for Metric Roller Chain

Sprockets for Double-Strand Metric Roller Chain

Idler Sprockets for Metric Roller Chain

Taper-Lock Bushing-Bore Sprockets for Metric Roller Chain

Flat Taper-Lock Bushing-Bore Sprockets for Double-Strand Metric Roller Chain